Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
  • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
  • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
  • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
  • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
  • B23B27/1662—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the cutting insert
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T407/00—Cutters, for shaping
  • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
  • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T407/00—Cutters, for shaping
  • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
  • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
  • Y10T407/2274—Apertured tool
  • Y10T407/2276—Apertured tool with means projecting through aperture to force tool laterally against reaction surface
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T407/00—Cutters, for shaping
  • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
  • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
  • Y10T407/2282—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder including tool holding clamp and clamp actuator
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T407/00—Cutters, for shaping
  • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
  • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
  • Y10T407/2282—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder including tool holding clamp and clamp actuator
  • Y10T407/2292—Slidable jaw

Definitions

• an apparatus and method for clamping an insert in a tool holder comprises a head portion including a first bore passing through a top surface and a bottom surface, and a second bore passing through a first side surface and a second side surface intersecting the first bore; a clamp pin including a clamp portion and a cam portion having a first angled surface and a second angled surface, a portion of the clamp pin being positioned within the first bore; and a lock screw movably mounted within the second bore and including a first angled surface and a second angled surface for engaging the first and second angled surfaces of the clamp pin.
• Rotating the lock screw in a first direction causes the first angled surface of the lock screw to engage the first angled surface of the clamp pin and act as a first cam surface to move the clamp portion of the clamp pin in a direction downward and toward the insert.
• Rotating the lock screw in a second direction causes the second angled surface of the lock screw to engage the second angled surface of the clamp pin and act as a second cam surface to move the clamp portion of the clamp pin in a direction upward and away from the insert.
• a clamp pin tool holder comprises a head portion including an insert pocket for receiving an insert; a clamp pin including a clamp portion and a cam portion having a first angled surface and a second angled surface, a portion of the clamp pin being positioned within a bore of the head portion; and a lock screw rotatably mounted to the head portion, the lock screw including a first angled surface and a second angled surface for engaging the first and second angled surfaces of the clamp pin.
• Rotating the lock screw in a first direction causes relative movement between the clamp pin and the lock screw such that the first angled surface of the lock screw engages the first angled surface of the clamp pin and moves the clamp portion of the clamp pin downward and toward the insert, thereby placing said tool holder in a clamped position.
• Rotating the lock screw in a second, opposite direction causes relative movement between the clamp pin and the lock screw such that the second angled surface of the lock screw engages the second angled surface of the clamp pin and moves the clamp portion of the clamp pin in a direction upward and away from the insert, thereby placing the tool holder in a released position.
• a device for clamping an insert within an insert pocket of a tool holder comprises a head portion; a clamp pin including a clamp portion and a cam portion having at least one angled surface a portion of the clamp pin being positioned within a bore of the head portion; and a lock screw rotatably mounted to the head portion, the lock screw including at least one angled surface for engaging the at least one angled surface of the clamp pin.
• Rotating the lock screw in a first direction causes the lock screw to move in a transverse direction with respect to the clamp pin such that the at least one angled surface of the lock screw engages the at least one angled surface of the clamp pin to move the clamp portion of the clamp pin relative to the insert.
• Figure 1 is a perspective view of a clamp pin tool holder according to an embodiment of the invention.
• Figure 2 is a top view of the clamp pin tool holder of Figure 1 with the insert and clamp pin removed for clarity;
• Figure 3 is a side view of the clamp pin tool holder of Figure 1 with the insert and clamp pin removed for clarity;
• Figure 4 is a perspective view of the clamp pin according to an embodiment of the invention.
• Figure 5 is another perspective view of the clamp pin according to an embodiment of the invention.
• Figure 6 is a side view of the clamp pin according to an embodiment of the invention.
• Figure 7 is another side view of the clamp pin according to an embodiment of the invention.
• Figure 8 is a perspective view of the lock screw according to an embodiment of the invention.
• Figure 9 is another perspective view of the lock screw according to an embodiment of the invention.
• Figure 10 is a side view of the lock screw according to an embodiment of the invention.
• Figure 11 is a front view of the clamp pin and lock screw according to an embodiment of the invention when the tool holder is in a clamped position;
• Figure 12 is a front view of the clamp pin and lock screw according to an embodiment of the invention when the tool holder is in a released position;
• Figure 13 is a partial cross sectional view of the clamp pin and lock screw according to an embodiment of the invention when the tool holder is in the clamped position;
• Figure 14 is a partial cross sectional view of the clamp pin and lock screw according to an embodiment of the invention when the tool holder is in the released position.
• FIGS. 1-3 show a clamp pin tool holder, shown generally at 10, according to an embodiment of the invention.
• the tool holder 10 includes a generally rectangular or square-shaped shank portion 12 and a head portion 14 that includes a top surface 14a, a bottom surface 14b, a first side surface 14c, an opposite second side surface 14d, and a third side surface 14e that may be formed at an angle with respect to with respect to the side surfaces 14c, 14d.
• the head portion 14 also includes an insert pocket 16 defined by a seat surface 16a, a first side surface 16b and a second side surface 16c.
• An insert 18 having a bore 18a is received and supported by the seat surface 16a and side surfaces 16b, 16c of the insert pocket 16 when mounted in the tool holder 10. In this manner, the insert 18 is held by a two-point contact defined by the side surfaces 16b, 16c and the seat surface 16a when the insert 18 is pulled back and down while being placed from a released position to a clamped position.
• the head portion 14 also includes an aperture or bore 19 that extends from the seat surface 16a to the bottom surface 14b. As shown in FIG. 2, the bore 19 may be generally round or circular in shape that corresponds to the shape of the clamp pin 20 and having a sufficient diameter to allow clearance for forward and backward movement of the clamp pin 20 within the bore 19.
• a passageway 13 extends laterally from the side surface 14d to the angled side surface 14e such that a portion of the passageway 13 may intersect the bore 19 at a substantially perpendicular angle.
• a threaded bore 15 extends from the side surface 14d to the side surfaces 14c, 14e. The threaded bore 15 is formed in the head portion 14 at an angle with respect to the side surface 14d and may be formed generally parallel to the passageway 13.
• the centerline of the threaded bore 15 for the lock screw 30 does not intersect the centerline of the bore 19 for the clamp pin 20. That is, the centerline of the threaded bore 15 and the centerline of the bore 19 are offset from one another. Because the centerline of the threaded bore 15 for the lock screw 30 is offset from the centerline of the bore 19 for the clamp pin 20, the threaded bore 15 can be placed behind the bore 19 for the clamp pin 20 in an area of the tool holder 10 that has more space for the threaded bore 15. This allows for smaller components as well as optimum placement of those components.
• the tool holder 10 may also provided with a shim (not shown) of a type well-known in the art interposed between the insert 18 and the seat surface 16a.
• the tool holder 10 includes a lock pin or clamp pin, indicated generally at 20, that is situated in the bore 19 formed in the head portion 14 of the tool holder 10.
• the clamp pin 20 is generally a C-shaped member (when viewed in FIGS. 6 and 7) having a sufficient length such that the clamp pin 20 is capable of extending the entire length from the bore 18a of the insert 18 to the bottom surface 14b of the head portion 14 of the tool holder 10.
• the clamp pin 20 includes a projection or clamp portion, shown generally at 22, that extends upwardly and laterally outwardly from a barrel portion 24 toward the insert 18.
• the clamp portion 22 includes a top surface 22a, a rounded rear surface 22b, a first faceted front surface 22c, and a second faceted front surface 22d.
• the first and second faceted front surfaces 22c, 22d are formed at an angle with respect to each other to conform to the contour of the bore 18a of the insert 18. In this manner, the clamp portion 22 positively and securely holds the insert 18 within the pocket 16 of the tool holder 10 when in the clamped position.
• the clamp portion 22 is generally circular-shaped in cross section having a smaller diameter than the diameter of the bore 18a of the insert 18 to allow sufficient clearance for removing the insert 18 from the tool holder 10 when in the released position (see FIG. 1).
• the barrel portion 24 may have a diameter slightly larger than the diameter of the clamp portion 22 of the clamp pin 20, but slightly smaller than the bore 18a of the insert 18.
• the clamp portion 22 may also include a front radius blend 22e transitioning between the faceted front surface 22d and the barrel portion 24, and a rear radius blend 22f transitioning between the rounded rear surface 22b and the barrel portion 24.
• the barrel portion 24 terminates at a collar portion, shown generally at 26.
• the collar portion 26 includes a collar 26a and a radius blend 26b for providing a transition between the barrel portion 24 and the collar portion 26.
• the collar portion 26 is generally circular-shaped in cross section having a diameter slightly smaller than the diameter of the bore 19 of the head portion 14.
• the collar 26a of the collar portion 26 is substantially flush with the seat surface 16a when the tool holder 10 is placed in a clamped position, and extends slightly above the seat surface 16a when the tool holder 10 is placed in a released position.
• the clamp pin 20 further includes a central body portion, shown generally at 27.
• the body portion 27 is generally circular-shaped in cross section with a diameter slightly smaller than the diameter of the bore 19 of the tool holder 10.
• the body portion 27 includes a cutout portion 27a formed in the rear of the body portion 27 and having a dimension, d, extending along a longitudinal axis, L, of the clamp pin 20.
• a stop pin 40 such as a roll pin, dowel pin, and the like, resides within the passageway 13 of the head portion 14 of the tool holder 10 and at least partially resides within the cutout portion 27a of the body portion 27.
• the dimension, d, of the cutout portion 27 defines a length of travel of the clamp pin 20 within the bore 19.
• the longitudinal axis, L, of the body portion 27 is formed at an angle 25 with respect to an axis, A, of the clamp portion 22 and barrel portion 24 of the claim pin 20.
• the angle 25 is in a range between about 0 degrees to about 60 degrees, for example, the angle 25 can be approximately 30 degrees.
• the invention is not limited by the relative angle 25 between the clamp portion 22 and the body portion 27, and that the invention can be practiced using any desired angle.
• the clamp pin 20 further includes a cam portion, shown generally at 28, that extends outwardly with respect to the body portion 27.
• the cam portion 28 includes a pair of upper angled surfaces 28a, 28b, and a pair of lower angled surfaces 28c, 28d that act a cam surfaces, as described in more detail below.
• the pair of upper angled surfaces 28a, 28b are at an angle in a range between approximately 20 degrees and approximately 140 degrees with respect to each other. In the illustrated embodiment, the upper angled surfaces 28a, 28b are at an angle of approximately 80 degrees with respect to each other.
• the curved rear of the cam portion 28 is substantially coplanar with the curved rear of the body portion 27, as shown in FIG. 7.
• the clamp pin 20 further includes a nose portion, shown generally at 29.
• the curved front of the nose portion 29 is substantially coplanar with the curved front of the body portion 27, as shown in FIG. 7.
• the nose portion 29 includes a bottom surface 29a that is substantially parallel with the top surface 22a of the clamp portion 22.
• the tool holder 10 further includes a lock screw, shown generally at 30.
• the lock screw 30 comprises a pair of generally cylindrical portions 32, 34 separated by a generally cylindrical intermediate portion 36.
• Each cylindrical portion 32, 34 includes a body portion 32a, 34a having a substantially uniform diameter. In the illustrated embodiment, the body portion 32a has a slightly smaller diameter than the body portion 34a.
• the invention can be practiced in which the body portions 32a, 34a have the same diameter, or that the body portion 32a can have a larger diameter than the body portion 34a. In any event, the body portions 32a, 34a have a diameter that is larger than the intermediate portion 36.
• a socket 32b is provided at the end of the cylindrical portion 32, and a socket 34b is provided at the end of the cylindrical portion 34.
• the sockets 32b, 34b are adapted to receive an Allen wrench or other suitable tool for rotating the lock screw 30, as shown in FIGS. 8 and 9. It will be appreciated that the invention can be practiced using only one socket provided on only one cylindrical portion 32, 34.
• the lock screw 30 is provided in the threaded bore 15 in the head portion 14, or alternatively in the shank portion 12.
• the access of the lock screw 30 from the side surface 14d of the tool holder 10 maybe desirable in certain applications in which accessibility of one or more of the sockets 32b, 34b on the lock screw 30 is difficult.
• Each cylindrical portion 32, 34 also includes an angled, conical surface 32c, 34c that tapers from the larger diameter body portions 32a, 34a to the smaller diameter intermediate portion 36.
• the surfaces 32c, 34c may be formed at approximately the same angle as the angled surfaces 28a, 28d of the clamp pin 20.
• the surfaces 32c, 34c can be formed at an angle in a range between about 20 degrees and 140 degrees with respect to each other.
• the surfaces 32c, 34c are formed at an angle of approximately 80 degrees with respect to each other.
• the surfaces 32c, 34c act as cam surfaces when engaging the upper angled surfaces 28a, 28b, and a pair of lower angled surfaces 28c, 28d of the cam portion 28 of the clamp pin 20.
• the insert 18 is clamped against the first side surface 16b and the second side surface 16c of the insert pocket 16 by rotating the lock screw 30 so that the lock screw 30 travels longitudinally within the threaded bore 15 and transversely with respect to the clamp pin 20, as shown in FIGS. 11-14.
• the tool holder 10 is in a clamped position in which the angled surface 34c of the lock screw 30 engages the angled surface 28c of the clamp pin 20 to positively secure the insert 18 against the side surfaces 16b, 16c of the insert pocket 16 of the tool holder 10.
• the lock screw 30 When the lock screw 30 is rotated in a first direction, for example, a counterclockwise direction, the lock screw 30 moves longitudinally from right to left (as indicated by the arrow in FIG. 11) in a transverse direction with respect to the clamp pin 20. As the lock screw 30 starts to move transversely with respect to the clamp pin 20, the angled surface 34c of the lock screw 30 no longer engages the angled surface 28c of the clamp pin 20. As the lock screw 30 continues to move transversely (to the left as viewed in FIG. 11), the angled surface 32c of the lock screw 30 will engage the angled surface 28b of the clamp pin 20.
• a first direction for example, a counterclockwise direction
• the lock screw 30 moves longitudinally from right to left (as indicated by the arrow in FIG. 11) in a transverse direction with respect to the clamp pin 20.
• the angled surface 34c of the lock screw 30 no longer engages the angled surface 28c of the clamp pin 20.
• the angled surfaces 32c and 28b act as cam surfaces to cause the clamp pin 20 to move upward and away from the insert 18 (and also upward and away from the lock screw 30).
• the insert 18 is placed over the clamp portion 22 of the clamp pin 20.
• the lock screw 30 is rotated in a second, opposite direction, for example, a clockwise direction, and the lock screw 30 moves longitudinally from left to right (as indicated by the arrow in FIG. 11) in a transverse direction with respect to the clamp pin 20.
• the angled surface 32c of the lock screw 30 no longer engages the angled surface 28d of the clamp pin 20.
• the lock screw 30 continues to move transversely (to the right as viewed in FIG.
• the angled surface 34c of the lock screw 30 will engage the angled surface 28c of the clamp pin 20.
• the angled surfaces 34c and 28c act as cam surfaces to cause the clamp pin 20 to move downward and toward the insert 18 (and also downward and toward the lock screw 30).
• the insert 18 positively engages first and second side surfaces 16b, 16c of the insert pocket 16, and the tool holder 10 is in the clamped position as shown in FIGS. 11, 13. In the clamped position, the insert 18 is positively secured in the tool holder 10.
• the angled surfaces 32c, 34c of the lock screw 30 are at an angle of approximately 40 degrees with respect to the central axis 44 of the clamp pin 20 (approximately 80 degrees with respect to each other).
• the distance and speed of the downward travel of the clamp pin 20 with respect to the lock screw 30 can be selectively adjusted by varying the relative angles between the angled surfaces 28c, 28b of the clamp pin 20 and the angled surfaces 32c, 34c of the lock screw 30.
• the distance of upward or downward travel can be selectively adjusted by varying the distance, d, of the cutout portion 27a of the body portion 27 of the clamp pin 27.
• the clamp portion 22 and barrel portion 24 of the clamp pin 20 are at an angle 26 of approximately 30 degrees with respect to the body portion 27, the cam portion 28 and nose portion 29 of the clamp pin 20.
• the distance and speed of the forward and rearward travel of the clamp pin 20 with respect to the lock screw 30 can be selectively adjusted by varying the relative angles between the clamp portion 22 and barrel portion 24 with respect to the body portion 27, the cam portion 28 and nose portion 29 of the clamp pin 20.
• the tool holder 10 of the invention is designed to clamp either neutral or positive rake inserts that are currently held in place with a special screw. On some machines, this screw is not accessible. On any machine, the screw is often lost during removal.
• the design of the invention addresses both of these issues by allowing access from the front or back side of the tool holder 10 (one of which are accessible on all machine applications), and by having no parts which are required to separate from the tool holder 10 during insert change.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Cutting Tools, Boring Holders, And Turrets (AREA)
• Drilling Tools (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (2)

Family

ID=37567579

Family Applications (1)

Country Status (6)

Families Citing this family (19)

Citations (1)

Family Cites Families (17)

• 2005
  • 2005-06-22 US US11/158,553 patent/US7431539B2/en not_active Expired - Fee Related
• 2006
  • 2006-06-06 WO PCT/US2006/022040 patent/WO2007001763A2/en active Application Filing
  • 2006-06-06 CN CN2006800221332A patent/CN101287568B/zh not_active Expired - Fee Related
  • 2006-06-06 KR KR1020077029730A patent/KR101266995B1/ko not_active IP Right Cessation
  • 2006-06-06 JP JP2008518198A patent/JP5072838B2/ja not_active Expired - Fee Related
  • 2006-06-06 DE DE112006001599T patent/DE112006001599B4/de not_active Expired - Fee Related

Patent Citations (1)

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